Skyline 50k Endurance Run

AUG
2
2026
A long running 50K and half marathon around Lake Chabot Marina and East Bay parks each August, with community staffed aid stations, downloadable course guides, and post race plant based food.
Sun 2 Aug 2026
50 kilometers

Always double-check with the organizer's website! This page may contain affiliate links.

Skyline 50K Endurance Run

Skyline 50K Endurance Run is a 50 kilometer race with a half marathon option held in August at Lake Chabot Marina in Castro Valley, California. The course starts and finishes at Lake Chabot Marina and follows a large loop through the East Bay Regional Parks, reaching Skyline Gate. The half marathon uses a looped format that also starts and finishes at Lake Chabot Marina.

The event is one of the oldest continuously running 50k races in the United States and is known as a good race for first time ultrarunners. Aid stations are staffed by Bay Area running groups including Dusty Bottoms, Running for a Better Oakland, Lake Merritt Joggers and Striders, and Pamakids. A Volunteer Safety Patrol appears at key intersections to provide direction and encouragement.

Logistics and participant support include an optional bib pickup the day before at Sports Basement Berkeley where someone may pick up bibs for others, free self supported training runs organized through the Scena Strava club, and downloadable athlete guides and GPX files for the courses. All finishers receive a race shirt, special Skyline socks, and a finishers medal. Awards are given to overall winners and three deep by age group. The race is part of the P USATF Grand Prix and both races are UTMB Index events.

Post race food has included plant based barbecue and beer. Refunds are generally not offered; outside 30 days entries may be deferred to a future year or another Scena race. Visit the organization's website for the most recent information.

50 km
Skyline 50k